Improved pipe-wrench



J. R. BROWN. PIPE WRENCH.

No. 44,703. Patented oef.. 18, 1864.

UNITED STATES PATENT OFFICE.

JAMES R. BROWN, OF BOSTON, MASSACHUSETTS.

IMPROVED PIPE-WRENCH.

Speciticat-ion forming part of Letters Patent No. 44,703, dated October18, 1864.

To all whom, it may concern:

Be it known that I, JAMES R. BROWN, of Boston. in the county of Suffolkand State of Massarhrsetts, have invented an Improved Pipe-VVrench; andVI do hereby declare the same` to be fully described in the followingspecification, and represented -in the aecompanying drawings, of which-Figures l and 2 are views of opposite sides o"it; Fig. 3, a rearelevation, and Fig, 4 a longitudinal section, of it. Fig. 5 is a sideeleva tion of it as applied to a pipe.

In such drawings, A denotes the handle, aiiixed to a bifurcated shank,B, whose two prongs or parts, a a, are iiat and parallel and terminateat their ends in two toothed jaws, b b, each of which is disposed at anacute angie with respect to the front edge of the prong, as shown inFigs. 1 and 2. Between these prongs, or in the space between them, theshank c ofthe claw d, is arranged, as shown in the drawings, and nearits lower end is connected to the prongs by, and so as to be capable ofturning on, a pin, e, in front of which and arranged on the shank B, asshown in lthe figures, is a spring, f.

The jaw or toothed surface g ot" the claw d I arrange at an acute anglewith the inner face, h, of the shank c. Such angle may be about sixtydegrees.

When the pipe wrench so made is applied to a pipe, as shown in'Fi'g. 5,in which the pipe is exhibited at P, it will touch the pipe at threepoints about eqnidistant from each other, theinner side, h, of the shankc serving under the pressure of the pipe P against it, (such pressurebeing induced by the springf) to crowd the pipe up to the jaws b and g,and thus insure' a proper hold of such thereon while the wrench may bein use.

In some respects my improved pipe-wrench is similar to the wrenchdescribed in the United States Patent No. 18,135. It diti'ers4therefrom, however, in some important par tieulars, especially inhaving two separate jaws, b b, formed and arranged on two prongs, asdescribed-that is, so that the shank c otl the claw may work betweensuch prongs,as well as between the jaws b I, whereas in the wrench ofsaid Letters Patent No.18,135 a single rag-jaw, having a screwadjustment, is used. Y

My improved pipe-wreneh is self-adjusting when applied to a pipe. Inother words, it readily adapts itself to the pipe, and requires nomovement of a screw to lit it thereto.

I claim- My improved pipe-wrench, as constructed, with its claw d andthe shank e thereof, applied and arranged relatively to the two jaws b bandl their combined prongs a a, substantially in manner and so as tooperate there with, as specified.

JAMES R. BROWN.

Witnesses:

R. H. EDDY, F. P. HALE, Jr.

